Hadith 17:935
Waki’ narrated to us, from Sufyan, from Abu Ishaq, from Muslim ibn Nadhir, who said: A man asked for permission to enter upon Hudhayfah, and he put his head in. Hudhayfah said to him: "You have put your head in, so put your backside in."
حدثنا وكيع عن سفيان عن أبي إسحاق عن مسلم بن نذير قال استأذن رجل على حذيفة فأدخل رأسه فقال له حذيفة قد أدخلت رأسك فأدخل استك